All sealing surfaces are machined to close tolerances, providing tight shut off.

Independent wrench is cast in the cover.

Three stainless steel adjusting screws, silver-plated for added corrosion resistance, give parallelism to the plug, in the body.

The multiple top seal is designed to transmit sealing forces diagonally across the delta ring and vertically on the diaphragm to seal the plug shank, providing an added safeguard against fluids escaping to atmosphere.

The liner is locked to the casting by means of cast dovetail recesses and machined grooves, permitting the valve to be used on high vacuum and pressure application.